/*
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */



//~--- JDK imports ------------------------------------------------------------

import java.io.*;

import javax.activation.*;

import javax.mail.*;
import javax.mail.internet.*;

/**
 * A special MimeBodyPart used with MSMessage.
 *
 * @author John Mani
 * @author Bill Shannon
 */
public class MSBodyPart extends MimeBodyPart {
    private static final String UNKNOWN  = "UNKNOWN";
    private String              type     = UNKNOWN;
    private String              filename = UNKNOWN;
    private int                 start;
    private int                 end;
    private String              disposition;
    private String              encoding;

    public MSBodyPart(byte[] content, int start, int end, String disposition, String encoding) {
        this.content     = content;
        this.start       = start;
        this.end         = end;
        this.disposition = disposition;
        this.encoding    = encoding;
    }

    public String getContentType() throws MessagingException {

        // try to figure this out from the filename extension
        if (type == UNKNOWN) {
            processBegin();
        }

        return type;
    }

    public String getEncoding() throws MessagingException {
        return encoding;
    }

    public String getDisposition() throws MessagingException {
        return disposition;
    }

    public String getFileName() throws MessagingException {

        // get filename from the "begin" line
        if (filename == UNKNOWN) {
            processBegin();
        }

        return filename;
    }

    protected InputStream getContentStream() {
        return new ByteArrayInputStream(content, start, end - start);
    }

    /**
     * Process the "begin" line to extract the filename,
     * and from it determine the Content-Type.
     */
    private void processBegin() {
        InputStream in = getContentStream();

        try {
            BufferedReader r     = new BufferedReader(new InputStreamReader(in));
            String         begin = r.readLine();

            // format is "begin 666 filename.txt"
            if ((begin != null) && begin.regionMatches(true, 0, "begin ", 0, 6)) {
                int i = begin.indexOf(' ', 6);

                if (i > 0) {
                    filename = begin.substring(i + 1);

                    FileTypeMap map = FileTypeMap.getDefaultFileTypeMap();

                    type = map.getContentType(filename);

                    if (type == null) {
                        type = "application/octet-stream";
                    }
                }
            }
        } catch (IOException ex) {

            // ignore
        } finally {
            try {
                in.close();
            } catch (IOException ex) {

                // ignore it
            }

            if (filename == UNKNOWN) {
                filename = null;
            }

            if ((type == UNKNOWN) || (type == null)) {
                type = "text/plain";
            }
        }
    }
}


//~ Formatted by Jindent --- http://www.jindent.com
